Mixed substance containing HCFC-142b(chloro-1,1-difluoroethane) for moderate and high temperature heat pump

Abstract

The mixed work medium containing HCFC-142b(-chloro-1, 1-difluroethane) for high and medium temperature heat pump is suitable for use as the refrigerant of high and medium temperature heat pump system of condensation temperature of 60-120 deg.c. The mixed work medium is ternary or quarternary mixture of 10 kinds of components, including HCFC-124, HCFC-142b, HFE-134, HFC-143, HFC-236ca, HFC-245fa, HFC-236fa, HC-600a, HFC-134a and HCFC-123, in certain mass proportion; and various components are mixed physically at normal temperature. The present invention has no damage on ozone layer, low greenhouse effect potential, proper thermal parameters and excellent circulation performance, and may be used in both optimally designed HCFC22 air conditioner compressor and available HCFC22 air conditioner compressor to convert the air conditioner compressor into high and medium temperature heat pump set with the new work medium.

Description

technical field [0001] The invention belongs to the refrigerant in heat pump or refrigeration and air-conditioning systems, and is especially suitable as a refrigerant in medium-high temperature heat pump systems with a condensation temperature of 60-120°C. Background technique [0002] At the expense of consuming a part of high-grade energy (such as electric energy), heat pump technology converts low-grade heat energy that cannot be directly used (heat energy contained in air, soil, surface water or shallow groundwater, as well as geothermal energy, solar energy, and industrial energy) through a thermal cycle. The grade of waste heat, etc.) is raised to the level that can be used; the energy efficiency ratio (or performance coefficient--COP) of the system is generally higher than 3. In order to meet the requirements of the industrial sector for higher heating temperatures, heat pump technology is developing towards medium-high temperature (cond...

AI Technical Summary

Problems solved by technology

At present, the air conditioner-heat pump system that is widely used mainly uses HCFC22 or its substitutes R407C, R410A, etc., and the maximum temperature of hot water that the system can provide is 50-55°C (no matter how high it is, it will not only deteriorate the cycle performance, but also cause Breaking through the upper limit of pressure and exhaust temperature of the system and causing accidents), unable to provide heat energy at a higher temperature level